In the country guests tend to feel they are not highly __________ if the invitation to a dinner party is given only three or four days before the party date.
30. The pilot, whether ______ or design, made the plane do a sharp turn.
29. If you ______ go, at least wait until the rain stops.
28. The reason for his success is ______ he worked very hard.
27. He couldn’t ______ the fact that the money was found in his house.
26. —Who______ it be that is knocking at the door? —It ______ be Father, but I’m not sure.